完善: linkedlist

This commit is contained in:
huangsimin
2019-07-19 17:41:28 +08:00
parent 0fad6aae53
commit 76ca4e2a0e
7 changed files with 580 additions and 51 deletions

View File

@@ -0,0 +1,87 @@
package linkedlist
type Iterator struct {
ll *LinkedList
cur *Node
}
func (iter *Iterator) Value() interface{} {
return iter.cur.value
}
func (iter *Iterator) Prev() bool {
if iter.cur == iter.ll.head {
return false
}
iter.cur = iter.cur.prev
return iter.cur != iter.ll.head
}
func (iter *Iterator) Next() bool {
if iter.cur == iter.ll.tail {
return false
}
iter.cur = iter.cur.next
return iter.cur != iter.ll.tail
}
func (iter *Iterator) MoveToHead() {
iter.cur = iter.ll.head
}
func (iter *Iterator) MoveToTail() {
iter.cur = iter.ll.tail
}
type CircularIterator struct {
pl *LinkedList
cur *Node
}
func (iter *CircularIterator) Value() interface{} {
return iter.cur.value
}
func (iter *CircularIterator) Prev() bool {
if iter.pl.size == 0 {
return false
}
if iter.cur == iter.pl.head {
iter.cur = iter.pl.tail.prev
return true
}
iter.cur = iter.cur.prev
if iter.cur == iter.pl.head {
iter.cur = iter.pl.tail.prev
}
return true
}
func (iter *CircularIterator) Next() bool {
if iter.pl.size == 0 {
return false
}
if iter.cur == iter.pl.tail {
iter.cur = iter.pl.head.next
return true
}
iter.cur = iter.cur.next
if iter.cur == iter.pl.tail {
iter.cur = iter.pl.head.next
}
return true
}
func (iter *CircularIterator) MoveToHead() {
iter.cur = iter.pl.head
}
func (iter *CircularIterator) MoveToTail() {
iter.cur = iter.pl.tail
}

View File

@@ -0,0 +1,454 @@
package linkedlist
import (
"fmt"
"log"
"github.com/davecgh/go-spew/spew"
)
type Node struct {
prev *Node
next *Node
value interface{}
}
func (node *Node) Value() interface{} {
return node.value
}
type LinkedList struct {
head *Node
tail *Node
size uint
}
func New() *LinkedList {
l := &LinkedList{}
l.head = &Node{}
l.head.prev = nil
l.tail = &Node{}
l.tail.next = nil
l.head.next = l.tail
l.tail.prev = l.head
return l
}
func (l *LinkedList) Iterator() *Iterator {
return &Iterator{ll: l, cur: l.head}
}
func (l *LinkedList) CircularIterator() *CircularIterator {
return &CircularIterator{pl: l, cur: l.head}
}
func (l *LinkedList) Clear() {
l.head.next = nil
l.tail.prev = nil
l.size = 0
}
func (l *LinkedList) Empty() bool {
return l.size == 0
}
func (l *LinkedList) Size() uint {
return l.size
}
func (l *LinkedList) PushFront(values ...interface{}) {
var node *Node
l.size += uint(len(values))
for _, v := range values {
node = &Node{}
node.value = v
hnext := l.head.next
hnext.prev = node
node.next = hnext
node.prev = l.head
l.head.next = node
}
}
func (l *LinkedList) PushBack(values ...interface{}) {
var node *Node
l.size += uint(len(values))
for _, v := range values {
node = &Node{}
node.value = v
tprev := l.tail.prev
tprev.next = node
node.prev = tprev
node.next = l.tail
l.tail.prev = node
}
}
func (l *LinkedList) PopFront() (result interface{}, found bool) {
if l.size != 0 {
l.size--
temp := l.head.next
hnext := temp.next
hnext.prev = l.head
l.head.next = hnext
result = temp.value
found = true
return
}
return nil, false
}
func (l *LinkedList) PopBack() (result interface{}, found bool) {
if l.size != 0 {
l.size--
temp := l.tail.prev
tprev := temp.prev
tprev.next = l.tail
l.tail.prev = tprev
result = temp.value
found = true
return
}
return nil, false
}
func (l *LinkedList) Front() (result interface{}, found bool) {
if l.size != 0 {
return l.head.next.value, true
}
return nil, false
}
func (l *LinkedList) Back() (result interface{}, found bool) {
if l.size != 0 {
return l.tail.prev.value, true
}
return nil, false
}
func (l *LinkedList) Find(every func(idx uint, value interface{}) bool) (interface{}, bool) {
idx := uint(0)
// 头部
for cur := l.head.next; cur != l.tail; cur = cur.next {
if every(idx, cur.value) {
return cur.value, true
}
idx++
}
return nil, false
}
func (l *LinkedList) FindMany(every func(idx uint, value interface{}) int) (result []interface{}, isfound bool) {
// the default of isfould is false
idx := uint(0)
// 头部
for cur := l.head.next; cur != l.tail; cur = cur.next {
j := every(idx, cur.value)
switch {
case j > 0:
result = append(result, cur.value)
isfound = true
case j < 0:
return result, isfound
}
idx++
}
return result, isfound
}
func (l *LinkedList) Index(idx uint) (interface{}, bool) {
if idx >= l.size {
return nil, false
}
if idx > l.size/2 {
idx = l.size - 1 - idx
// 尾部
for cur := l.tail.prev; cur != l.head; cur = cur.prev {
if idx == 0 {
return cur.value, true
}
idx--
}
} else {
// 头部
for cur := l.head.next; cur != l.tail; cur = cur.next {
if idx == 0 {
return cur.value, true
}
idx--
}
}
return nil, false
}
func (l *LinkedList) Insert(idx uint, values ...interface{}) {
if idx > l.size { // 插入的方式 可能导致size的范围判断不一样
return
}
if idx > l.size/2 {
idx = l.size - idx
// 尾部
for cur := l.tail.prev; cur != nil; cur = cur.prev {
if idx == 0 {
var start *Node
var end *Node
start = &Node{value: values[0]}
end = start
for _, value := range values[1:] {
node := &Node{value: value}
end.next = node
node.prev = end
end = node
}
cnext := cur.next
cur.next = start
start.prev = cur
end.next = cnext
cnext.prev = end
break
}
idx--
}
} else {
// 头部
for cur := l.head.next; cur != nil; cur = cur.next {
if idx == 0 {
var start *Node
var end *Node
start = &Node{value: values[0]}
end = start
for _, value := range values[1:] {
node := &Node{value: value}
end.next = node
node.prev = end
end = node
}
cprev := cur.prev
cprev.next = start
start.prev = cprev
end.next = cur
cur.prev = end
break
}
idx--
}
}
l.size += uint(len(values))
}
// InsertState InsertIf的every函数的枚举 从左到右 1 为前 2 为后 insert here(2) ->cur-> insert here(1)
// UninsertAndContinue 不插入并且继续
// UninsertAndBreak 不插入并且停止
// InsertBack cur后插入并且停止
// InsertFront cur前插入并且停止
type InsertState int
const (
// UninsertAndContinue 不插入并且继续
UninsertAndContinue InsertState = 0
// UninsertAndBreak 不插入并且停止
UninsertAndBreak InsertState = -1
// InsertBack cur后插入并且停止
InsertBack InsertState = 2
// InsertFront cur前插入并且停止
InsertFront InsertState = 1
)
// InsertIf every函数的枚举 从左到右遍历 1 为前 2 为后 insert here(2) ->cur-> insert here(1)
func (l *LinkedList) InsertIf(every func(idx uint, value interface{}) InsertState, values ...interface{}) {
idx := uint(0)
// 头部
for cur := l.head.next; cur != nil; cur = cur.next {
insertState := every(idx, cur.value)
if insertState == UninsertAndContinue {
continue
}
if insertState > 0 { // 1 为前 2 为后 insert here(2) ->cur-> insert here(1)
var start *Node
var end *Node
start = &Node{value: values[0]}
end = start
for _, value := range values[1:] {
node := &Node{value: value}
end.next = node
node.prev = end
end = node
}
if insertState == InsertBack {
cprev := cur.prev
cprev.next = start
start.prev = cprev
end.next = cur
cur.prev = end
} else { // InsertFront
cnext := cur.next
cnext.prev = end
start.prev = cur
cur.next = start
end.next = cnext
}
l.size += uint(len(values))
return
}
// 必然 等于 UninsertAndBreak
return
}
}
func remove(cur *Node) {
curPrev := cur.prev
curNext := cur.next
curPrev.next = curNext
curNext.prev = curPrev
cur.prev = nil
cur.next = nil
}
func (l *LinkedList) Remove(idx uint) (interface{}, bool) {
if l.size <= idx {
log.Printf("out of list range, size is %d, idx is %d\n", l.size, idx)
return nil, false
}
l.size--
if idx > l.size/2 {
idx = l.size - idx // l.size - 1 - idx, 先减size
// 尾部
for cur := l.tail.prev; cur != l.head; cur = cur.prev {
if idx == 0 {
remove(cur)
return cur.value, true
}
idx--
}
} else {
// 头部
for cur := l.head.next; cur != l.tail; cur = cur.next {
if idx == 0 {
remove(cur)
return cur.value, true
}
idx--
}
}
panic(fmt.Sprintf("unknown error"))
}
// RemoveState RemoveIf的every函数的枚举
// RemoveAndContinue 删除并且继续
// RemoveAndBreak 删除并且停止
// UnremoveAndBreak 不删除并且停止遍历
// UnremoveAndContinue 不删除并且继续遍历
type RemoveState int
const (
// RemoveAndContinue 删除并且继续
RemoveAndContinue RemoveState = iota
// RemoveAndBreak 删除并且停止
RemoveAndBreak
// UnremoveAndBreak 不删除并且停止遍历
UnremoveAndBreak
// UnremoveAndContinue 不删除并且继续遍历
UnremoveAndContinue
)
// RemoveIf every的遍历函数操作remove过程 如果没删除result 返回nil, isRemoved = false
func (l *LinkedList) RemoveIf(every func(idx uint, value interface{}) RemoveState) (result []interface{}, isRemoved bool) {
// 头部
idx := uint(0)
TOPFOR:
for cur := l.head.next; cur != l.tail; idx++ {
removeState := every(idx, cur.value)
switch removeState {
case RemoveAndContinue:
result = append(result, cur.value)
isRemoved = true
temp := cur.next
remove(cur)
cur = temp
l.size--
continue TOPFOR
case RemoveAndBreak:
result = append(result, cur.value)
isRemoved = true
temp := cur.next
remove(cur)
cur = temp
l.size--
return
case UnremoveAndContinue:
case UnremoveAndBreak:
return
}
cur = cur.next
}
return
}
func (l *LinkedList) Values() (result []interface{}) {
l.Traversal(func(value interface{}) bool {
result = append(result, value)
return true
})
return
}
func (l *LinkedList) String() string {
return spew.Sprint(l.Values())
}
func (l *LinkedList) Traversal(every func(interface{}) bool) {
for cur := l.head.next; cur != l.tail; cur = cur.next {
if !every(cur.value) {
break
}
}
}

View File

@@ -0,0 +1,664 @@
package linkedlist
import (
"testing"
"github.com/Pallinder/go-randomdata"
"github.com/davecgh/go-spew/spew"
)
func TestPushFront(t *testing.T) {
l := New()
for i := 0; i < 5; i++ {
l.PushFront(i)
}
var result string
result = spew.Sprint(l.Values())
if result != "[4 3 2 1 0]" {
t.Error(result)
}
l.PushFront(0)
result = spew.Sprint(l.Values())
if result != "[0 4 3 2 1 0]" {
t.Error(result)
}
}
func TestPushBack(t *testing.T) {
l := New()
for i := 0; i < 5; i++ {
l.PushBack(i)
}
var result string
result = spew.Sprint(l.Values())
if result != "[0 1 2 3 4]" {
t.Error(result)
}
l.PushBack(0)
result = spew.Sprint(l.Values())
if result != "[0 1 2 3 4 0]" {
t.Error(result)
}
}
func TestPopFront(t *testing.T) {
l := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l.PushFront(i)
}
// var result string
for i := 4; i >= 0; i-- {
if v, ok := l.PopFront(); ok {
if v != i {
t.Error("[4 3 2 1 0] PopFront value should be ", i, ", but is ", v)
}
} else {
t.Error("PopFront is not ok")
}
if l.Size() != uint(i) {
t.Error("l.Size() is error, is", l.Size())
}
}
}
func TestPopBack(t *testing.T) {
l := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l.PushFront(i)
}
// var result string
for i := 0; i < 5; i++ {
if v, ok := l.PopBack(); ok {
if v != i {
t.Error("[4 3 2 1 0] PopFront value should be ", i, ", but is ", v)
}
} else {
t.Error("PopFront is not ok")
}
if l.Size() != uint(5-i-1) {
t.Error("l.Size() is error, is", l.Size())
}
}
}
func TestInsert2(t *testing.T) {
l := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l.PushFront(0, i)
}
// step1: [0 0] -> step2: [1 0 0 0] front
if l.String() != "[4 0 3 0 2 0 1 0 0 0]" {
t.Error(l.String())
}
l.Insert(l.Size(), 5)
// step1: [0 0] -> step2: [4 0 3 0 2 0 1 0 0 0] front size is 10, but you can insert 11. equal to PushBack [4 0 3 0 2 0 1 0 0 0 5]
if l.String() != "[4 0 3 0 2 0 1 0 0 0 5]" {
t.Error(l.String())
}
}
func TestInsert1(t *testing.T) {
l1 := New()
l2 := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l1.Insert(0, i)
l2.PushFront(i)
}
var result1, result2 string
result1 = spew.Sprint(l1.Values())
result2 = spew.Sprint(l2.Values())
if result1 != result2 {
t.Error(result1, result2)
}
for i := 0; i < 5; i++ {
l1.Insert(l1.Size(), i)
l2.PushBack(i)
// t.Error(l1.Values(), l2.Values())
}
result1 = spew.Sprint(l1.Values())
result2 = spew.Sprint(l2.Values())
if result1 != result2 {
t.Error(result1, result2)
}
if result1 != "[4 3 2 1 0 0 1 2 3 4]" {
t.Error("result should be [4 3 2 1 0 0 1 2 3 4]\n but result is", result1)
}
l1.Insert(1, 99)
result1 = spew.Sprint(l1.Values())
if result1 != "[4 99 3 2 1 0 0 1 2 3 4]" {
t.Error("[4 3 2 1 0 0 1 2 3 4] insert with index 1, should be [4 99 3 2 1 0 0 1 2 3 4]\n but result is", result1)
}
l1.Insert(9, 99)
result1 = spew.Sprint(l1.Values())
if result1 != "[4 99 3 2 1 0 0 1 2 99 3 4]" {
t.Error("[4 99 3 2 1 0 0 1 2 3 4] insert with index 9, should be [4 99 3 2 1 0 0 1 2 99 3 4]\n but result is", result1)
}
l1.Insert(12, 99)
result1 = spew.Sprint(l1.Values())
if result1 != "[4 99 3 2 1 0 0 1 2 99 3 4 99]" {
t.Error("[4 99 3 2 1 0 0 1 2 99 3 4] insert with index 12, should be [4 99 3 2 1 0 0 1 2 99 3 4 99]\n but result is", result1)
}
}
func TestInsertIf(t *testing.T) {
l := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l.Insert(0, i)
}
// "[4 3 2 1 0]" 插入两个11
for i := 0; i < 2; i++ {
l.InsertIf(func(idx uint, value interface{}) InsertState {
if value == 3 {
return InsertFront
}
return UninsertAndContinue
}, 11)
}
var result string
result = spew.Sprint(l.Values())
if result != "[4 3 11 11 2 1 0]" {
t.Error("result should be [4 3 11 11 2 1 0], reuslt is", result)
}
// "[4 3 2 1 0]"
for i := 0; i < 2; i++ {
l.InsertIf(func(idx uint, value interface{}) InsertState {
if value == 0 {
return InsertBack
}
return UninsertAndContinue
}, 11)
}
result = spew.Sprint(l.Values())
if result != "[4 3 11 11 2 1 11 11 0]" {
t.Error("result should be [4 3 11 11 2 1 11 11 0], reuslt is", result)
}
// "[4 3 2 1 0]"
for i := 0; i < 2; i++ {
l.InsertIf(func(idx uint, value interface{}) InsertState {
if value == 0 {
return InsertFront
}
return UninsertAndContinue
}, 11)
}
result = spew.Sprint(l.Values())
if result != "[4 3 11 11 2 1 11 11 0 11 11]" {
t.Error("result should be [4 3 11 11 2 1 11 11 0 11 11], reuslt is", result)
}
// t.Error(l.Values())
}
func TestFind(t *testing.T) {
l := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l.PushFront(i)
}
if v, isfound := l.Find(func(idx uint, value interface{}) bool {
if idx == 1 {
return true
}
return false
}); isfound {
if v != 3 {
t.Error("[4 3 2 1 0] index 1 shoud be 3 but value is", v)
}
} else {
t.Error("should be found")
}
if v, isfound := l.Find(func(idx uint, value interface{}) bool {
if idx == 5 {
return true
}
return false
}); isfound {
t.Error("should not be found, but v is found, ", v)
}
}
func TestFindMany(t *testing.T) {
l := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l.PushFront(i)
}
if values, isfound := l.FindMany(func(idx uint, value interface{}) int {
if idx >= 1 {
return 1
}
return 0
}); isfound {
var result string
result = spew.Sprint(values)
if result != "[3 2 1 0]" {
t.Error("result should be [3 2 1 0], reuslt is", result)
}
} else {
t.Error("should be found")
}
if values, isfound := l.FindMany(func(idx uint, value interface{}) int {
if idx%2 == 0 {
return 1
}
return 0
}); isfound {
var result string
result = spew.Sprint(values)
if result != "[4 2 0]" {
t.Error("result should be [3 2 1 0], reuslt is", result)
}
} else {
t.Error("should be found")
}
if values, isfound := l.FindMany(func(idx uint, value interface{}) int {
if value == 0 || value == 2 || value == 4 || value == 7 {
return 1
}
return 0
}); isfound {
var result string
result = spew.Sprint(values)
if result != "[4 2 0]" {
t.Error("result should be [4 2 0], reuslt is", result)
}
} else {
t.Error("should be found")
}
if values, isfound := l.FindMany(func(idx uint, value interface{}) int {
if value.(int) <= 2 {
return -1
}
if value.(int) <= 4 && value.(int) > 2 {
return 1
}
return 0
}); isfound {
var result string
result = spew.Sprint(values)
if result != "[4 3]" {
t.Error("result should be [4 2 0], reuslt is", result)
}
} else {
t.Error("should be found")
}
// if v, isfound := l.Find(func(idx uint, value interface{}) bool {
// if idx == 5 {
// return true
// }
// return false
// }); isfound {
// t.Error("should not be found, but v is found, ", v)
// }
}
func TestIndex(t *testing.T) {
l := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l.PushFront(i)
}
if v, ok := l.Index(4); ok {
if v != 0 {
t.Error("[4 3 2 1 0] Index 4 value is 0, but v is ", v)
}
} else {
t.Error("not ok is error")
}
if v, ok := l.Index(1); ok {
if v != 3 {
t.Error("[4 3 2 1 0] Index 1 value is 3, but v is ", v)
}
} else {
t.Error("not ok is error")
}
if v, ok := l.Index(0); ok {
if v != 4 {
t.Error("[4 3 2 1 0] Index 1 value is 4, but v is ", v)
}
} else {
t.Error("not ok is error")
}
if _, ok := l.Index(5); ok {
t.Error("[4 3 2 1 0] Index 5, out of range,ok = true is error")
}
}
func TestRemove(t *testing.T) {
l := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l.PushFront(i)
}
l.Remove(0)
var result string
result = spew.Sprint(l.Values())
if result != "[3 2 1 0]" {
t.Error("should be [3 2 1 0] but result is", result)
}
l.Remove(3)
result = spew.Sprint(l.Values())
if result != "[3 2 1]" {
t.Error("should be [3 2 1] but result is", result)
}
l.Remove(2)
result = spew.Sprint(l.Values())
if result != "[3 2]" {
t.Error("should be [3 2 1] but result is", result)
}
l.Remove(1)
result = spew.Sprint(l.Values())
if result != "[3]" {
t.Error("should be [3 2 1] but result is", result)
}
l.Remove(0)
result = spew.Sprint(l.Values())
if result != "<nil>" && l.Size() == 0 && len(l.Values()) == 0 {
t.Error("should be [3 2 1] but result is", result, "Size is", l.Size())
}
if _, rvalue := l.Remove(3); rvalue != false {
t.Error("l is empty")
}
}
func TestRemoveIf(t *testing.T) {
l := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l.PushFront(i)
}
if result, ok := l.RemoveIf(func(idx uint, value interface{}) RemoveState {
if value == 0 {
return RemoveAndContinue
}
return UnremoveAndContinue
}); ok {
if result[0] != 0 {
t.Error("result should is", 0)
}
} else {
t.Error("should be ok")
}
if result, ok := l.RemoveIf(func(idx uint, value interface{}) RemoveState {
if value == 4 {
return RemoveAndContinue
}
return UnremoveAndContinue
}); ok {
if result[0] != 4 {
t.Error("result should is", 4)
}
} else {
t.Error("should be ok")
}
var result string
result = spew.Sprint(l.Values())
if result != "[3 2 1]" {
t.Error("should be [3 2 1] but result is", result)
}
if result, ok := l.RemoveIf(func(idx uint, value interface{}) RemoveState {
if value == 4 {
return RemoveAndContinue
}
return UnremoveAndContinue
}); ok {
t.Error("should not be ok and result is nil")
} else {
if result != nil {
t.Error("should be nil")
}
}
result = spew.Sprint(l.Values())
if result != "[3 2 1]" {
t.Error("should be [3 2 1] but result is", result)
}
l.RemoveIf(func(idx uint, value interface{}) RemoveState {
if value == 3 || value == 2 || value == 1 {
return RemoveAndContinue
}
return UnremoveAndContinue
})
result = spew.Sprint(l.Values())
if result != "<nil>" {
t.Error("result should be <nil>, but now result is", result)
}
if results, ok := l.RemoveIf(func(idx uint, value interface{}) RemoveState {
if value == 3 || value == 2 || value == 1 {
return RemoveAndContinue
}
return UnremoveAndContinue
}); ok {
t.Error("why ok")
} else {
if results != nil {
t.Error(results)
}
}
}
func TestRemoveIf2(t *testing.T) {
l := New()
// "[4 3 2 1 0]"
for i := 0; i < 5; i++ {
l.PushFront(i)
}
for i := 0; i < 5; i++ {
l.PushFront(i)
}
// 只删除一个
if result, ok := l.RemoveIf(func(idx uint, value interface{}) RemoveState {
if value == 0 {
return RemoveAndBreak
}
return UnremoveAndContinue
}); ok {
if result[0] != 0 {
t.Error("result should is", 0)
}
} else {
t.Error("should be ok")
}
var resultstr string
resultstr = spew.Sprint(l.Values())
if resultstr != "[4 3 2 1 4 3 2 1 0]" {
t.Error("result should is", resultstr)
}
// 只删除多个
if result, ok := l.RemoveIf(func(idx uint, value interface{}) RemoveState {
if value == 4 {
return RemoveAndContinue
}
return UnremoveAndContinue
}); ok {
resultstr = spew.Sprint(result)
if resultstr != "[4 4]" {
t.Error("result should is", result)
}
resultstr = spew.Sprint(l.Values())
if resultstr != "[3 2 1 3 2 1 0]" {
t.Error("result should is", resultstr)
}
} else {
t.Error("should be ok")
}
}
func TestIterator(t *testing.T) {
ll := New()
for i := 0; i < 10; i++ {
ll.PushFront(i)
}
iter := ll.Iterator()
for i := 0; iter.Next(); i++ {
if iter.Value() != 9-i {
t.Error("iter.Next() ", iter.Value(), "is not equal ", 9-i)
}
}
if iter.cur != iter.ll.tail {
t.Error("current point is not equal tail ", iter.ll.tail)
}
for i := 0; iter.Prev(); i++ {
if iter.Value() != i {
t.Error("iter.Prev() ", iter.Value(), "is not equal ", i)
}
}
}
func TestCircularIterator(t *testing.T) {
ll := New()
for i := 0; i < 10; i++ {
ll.PushFront(i)
}
iter := ll.CircularIterator()
for i := 0; i != 10; i++ {
iter.Next()
if iter.Value() != 9-i {
t.Error("iter.Next() ", iter.Value(), "is not equal ", 9-i)
}
}
if iter.cur != iter.pl.tail.prev {
t.Error("current point is not equal tail ", iter.pl.tail.prev)
}
if iter.Next() {
if iter.Value() != 9 {
t.Error("iter.Value() != ", iter.Value())
}
}
iter.MoveToTail()
for i := 0; i != 10; i++ {
iter.Prev()
if iter.Value() != i {
t.Error("iter.Prev() ", iter.Value(), "is not equal ", i)
}
}
if iter.cur != iter.pl.head.next {
t.Error("current point is not equal tail ", iter.pl.tail.prev)
}
if iter.Prev() {
if iter.Value() != 0 {
t.Error("iter.Value() != ", iter.Value())
}
}
}
func BenchmarkPushBack(b *testing.B) {
ec := 5
cs := 2000000
b.N = cs * ec
for c := 0; c < ec; c++ {
l := New()
for i := 0; i < cs; i++ {
l.PushBack(i)
}
}
}
func BenchmarkPushFront(b *testing.B) {
ec := 5
cs := 2000000
b.N = cs * ec
for c := 0; c < ec; c++ {
l := New()
for i := 0; i < cs; i++ {
l.PushFront(i)
}
}
}
func BenchmarkInsert(b *testing.B) {
ec := 10
cs := 1000
b.N = cs * ec
for c := 0; c < ec; c++ {
l := New()
for i := 0; i < cs; i++ {
ridx := randomdata.Number(0, int(l.Size())+1)
l.Insert(uint(ridx), i)
}
}
}